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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
Untreated Gemstones Size
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Yellow Untreated Gemstones
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3.34ct Pink Strawberry Quartz, Oval, Translucent

3.34ct Pink Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 25.61

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1.02ct Blue Kyanite, Oval, VS-SI

1.02ct Blue Kyanite, Oval, VS-SI

7 x 5 mm (calibrated)

$ 21.23

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1.89ct Brown Tiger'S Eye, Pear Shape, Opaque

1.89ct Brown Tiger'S Eye, Pear Shape, Opaque

8 x 8 mm (calibrated)

$ 2.45

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2.27ctw White Rainbow Moonstone, Square, Transparent/Translucent

2.27ctw White Rainbow Moonstone, Square, Transparent/Translucent

3 x 3 mm (calibrated)

$ 35.94

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1.93ct Yellow Beryl, Round, VS

1.93ct Yellow Beryl, Round, VS

8.5 mm (calibrated)

$ 46.13

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2.76ct White Sillimanite Cat'S Eye, Oval, Translucent

2.76ct White Sillimanite Cat'S Eye, Oval, Translucent

9.4 x 6.6 mm

$ 21.17

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2.26ct Multicolor Spectrolite, Oval, Opaque

2.26ct Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 10.33

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1.23ct Orange Hessonite Garnet, Oval, VS

1.23ct Orange Hessonite Garnet, Oval, VS

7.6 x 6 mm

$ 20.85

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9.41ctw Multicolor Rhodochrosite, Fancy, Opaque

9.41ctw Multicolor Rhodochrosite, Fancy, Opaque

12 x 10 mm (calibrated)

$ 18.74

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29.35ct Multicolor Labradorite, Round, Translucent

29.35ct Multicolor Labradorite, Round, Translucent

25 mm

$ 64.90

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76.71ctw Green Seraphinite, Sphere / Ball, Opaque
Seraphinite Product Video (447455)

76.71ctw Green Seraphinite, Sphere / Ball, Opaque

14 mm (calibrated)

$ 126.06

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19.73ct Bi-Color Ametrine, Oval, VVS

19.73ct Bi-Color Ametrine, Oval, VVS

20 x 15 mm (calibrated)

$ 117.91

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2.89ct Multicolor Labradorite, Pear Shape, Translucent

2.89ct Multicolor Labradorite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 6.39

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2.09ct Brown Smoky Quartz, Round, VS-SI

2.09ct Brown Smoky Quartz, Round, VS-SI

8 mm (calibrated)

$ 11.45

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3.15ct Violet Amethyst, Trillion, VS

3.15ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 23.61

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1.39ct Orange Hessonite Garnet, Oval, VS

1.39ct Orange Hessonite Garnet, Oval, VS

7.7 x 6.3 mm

$ 27.69

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5.71ct Violet Amethyst, Heart, Transparent

5.71ct Violet Amethyst, Heart, Transparent

12.5 x 11.5 mm

$ 37.54

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37.25ct Green Amazonite, Oval, Opaque

37.25ct Green Amazonite, Oval, Opaque

39 x 20.6 mm

$ 29.68

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40.48ct Multicolor Rainbow Moonstone, Fancy, Opaque

40.48ct Multicolor Rainbow Moonstone, Fancy, Opaque

37.3 x 12.5 mm

$ 4.03

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13.01ct Brown Tiger'S Eye, Baguette, Opaque

13.01ct Brown Tiger'S Eye, Baguette, Opaque

18 x 13 mm (calibrated)

$ 12.96

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1.14ct Pink Morganite, Oval, VVS-VS
Morganite Product Video (618802)

1.14ct Pink Morganite, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 438.41

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12.28ct Multicolor Labradorite, Pear Shape, Translucent

12.28ct Multicolor Labradorite, Pear Shape, Translucent

18 x 13 mm (calibrated)

$ 27.15

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2.89ctw Yellow Golden Beryl, Oval, VVS-VS

2.89ctw Yellow Golden Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 69.66

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2.93ct Violet Amethyst, Trillion, VVS-VS

2.93ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 23.35

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Why Buy Untreated Gemstones from GemSelect?

Natural Untreated Gemstones

Our untreated gemstones are completely natural and have not undergone any enhancement processes. These gems display their original color and clarity as formed in nature, making them highly valued by collectors, jewelers, and gemstone enthusiasts.

Buy Untreated Gemstones Online

At GemSelect you can easily shop untreated gemstones online with confidence. Our inventory includes carefully sourced loose gemstones from around the world, with full transparency regarding treatments and gem origins.

Natural Untreated Loose Gemstones

Why Choose Untreated Gems?

Untreated gems are prized because they remain exactly as nature created them. Without heat or chemical treatments, these stones offer rarity and authenticity that many collectors and jewelry designers prefer.

Unheated Sapphire and Ruby

Some of the most sought-after untreated gemstones include unheated sapphire and ruby. These rare stones retain their natural color and are highly valued due to the absence of heat treatment commonly used to enhance corundum.

Gemstone Authenticity and Transparency

Every gemstone at GemSelect comes with clear treatment disclosure. When purchasing untreated stones, buyers can be confident they are receiving authentic gems that have not been altered by heat or other enhancement methods.

Untreated Gems for Custom Jewelry

Natural untreated gemstones are perfect for custom jewelry pieces. Their unique appearance ensures every ring, pendant, or pair of earrings features a one-of-a-kind gemstone created by nature.

Rare and Collectible Gemstones

Because many gemstones are routinely treated, truly untreated examples can be relatively rare. Collectors often seek untreated stones because they represent the most natural state of a gemstone.

Learn more about gemstone treatments and natural gem formation on our Gemstone Treatment Guide.

FAQs

What are untreated gemstones?

Untreated gemstones are natural gems that have not been enhanced with heat, chemicals, irradiation, or other treatments. They retain their original appearance as formed in nature.

Are untreated gemstones more valuable?

In many cases untreated gemstones are more valuable because they are rarer than treated stones. Natural color without enhancement is highly prized by collectors and investors.

How can I tell if a gemstone is untreated?

Gemstone treatment is typically determined through gemological testing. Reputable sellers like GemSelect clearly disclose whether a stone is untreated or has received any enhancements.

Which gemstones are commonly untreated?

Some gemstones frequently found untreated include garnet, spinel, peridot, and certain sapphires. However, many gem types may be treated depending on their origin and quality.

Are untreated gemstones suitable for jewelry?

Yes, untreated gemstones can be excellent for jewelry depending on their hardness and durability. Popular choices include sapphire, ruby, spinel, and garnet.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

hassle free experience.

Posted By Jhidron in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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